Pump



June 15, 1937. R. E. GREY ET AL PUMP 2 Sheets-Sheet 1 Filed Sept. 14, 1936 s N 5 my Mum m W w. 5 H4 fl Hsam Pp.

June 15,1937 R. E. REY ET AL I 2,083,560

PUMP

Filed Sept. 14, 1.956 2 Sheets-Sheet 2 v I ||||l|||| RALPH E. GREY BEEN/CE L. Boy/v TON F/"GJ/ 5612 A-u% M ATTORNEYS Patented June 15, 1937 PATENT OFFICE PUMP Ralph E. Grey and Bernice L. Boynton, Osborn, Ohio Application September 14, 1936, Serial No. 100,674

Claims.

(Granted under the act of March 3, 1883, as

amended April 30,

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to us of any royalty thereon.

This invention relates to rotary pumps and more particularly to pumps employing slidable vanes or blades and has for its primary object to provide a pump of the type referred to which is simple in construction, efficient in operation and inexpensive to manufacture.

A further object of the invention is to provide a pump of the type referred wherein the fluid introduced therein and discharged therefrom is caused to flow in the same general direction within the pump thereby materially increasing the efficiency of the pump over types at present available.

A further object of the invention is to provide an improved rotor assembly in which the vanes or blades are moved laterally by a simple cam arrangement wherein the rises of the cams cooperate with a sleeve specially formed to provide pairs of inlet and exhaust ports disposed upon diametrically opposite sides and in alternate relation whereby fluid is introduced into non-communicating chambers in the pump on opposite sides of the rotor and discharged therefrom alternately and successively.

A still further object of the invention is to provide an anti-friction mounting for the rotor to thereby reduce frictional resistance to a minimum.

With the objects above indicated and other objects hereinafter explained in view the invention consists in the construction and combination of elements hereinafter described and claimed.

Referring to the drawings,

Figure 1 is an end elevational view of a pump embodying the present invention and illustrating by arrows the passage of the fluid.

Figure 2 is a vertical sectional view taken on line 2-2 in Figure 1 showing the arrangement of one of the passageways.

Figure 3 is a longitudinal sectional view taken 45 on line 33 in Figure 2 and showing the arrangement of one pair of inlet and exhaust ports.

Figure 4 is a side elevational view of the rotor and blade assembly, the rotating positions of the blades representing the action of the cams at 50 that position of the rotor.

Figure 5 is a view taken on line 5-5 in Figure 4 and showing the angular relationship of the blades.

Figure 6 is a side elevational view of one of the 55 blades.

Figure 'I is a top view of the blade shown in Figure 6.

Figure 8 is a side elevational view of the pump illustrated in Figure 1 and showing the arrangement of the inlet and outlet passa w in dotted lines.

Figure 9 is a side elevational view of the cams and spacer, the latter being shown in cross section so as to illustrate the manner in which the inlet and exhaust ports are arranged.

Figure 10 is an end view of that shown in Figure 9.

Figure 11 is a longitudinal sectional view of the spacer member.

Figure 12 is an end view of that shown in Figure 11.

Figure 13 is a fragmentary diagrammatic developed view of thepump housing showing more clearly the relationship of the inlet and outlet passageways, the flow of fluid being indicated by arrows.

Figure 14 is a fragmentary sectional view showing a modified construction of the spacer and cams but embodying the present invention.

In the drawings we have illustrated a pump embodying the present invention, but it should be understood that the invention is adapted for other used and is not therefore to be so restricted.

Referring more particularly to Figures 1, 2,,and

' 3, the pump comprises a housing 20, preferably an aluminum casting, which has a body portion 2 of circular cross section provided with an axial bore 22 extending inwardly from one end thereof and terminating to provide an end wall 24. A pair of steel cam members 25 and 26 are coaxially positioned within the bore 22 and spaced apart longitudinally by a spacer member or liner 21 having a force fit within the bore or provided with other means for preventing relative movement within the housing. The side of the cam member 25 opposite to the spacer member 21 abuts the wall 24 and the side of the cam member 26 opposite to the spacer member 21 is disposed within a recess 28 provided upon the adjacent side of a cover plate 29 which in turn is detachably connected by screws 30 to the open end of the body portion 2|. The cam members 25 and 26 are secured against relative rotation by any desirable interconnecting means such as the pins 3| of which any required number may be employed. The inside faces of the cam members 25 and 26 are identical except for their relative positions and an explanation of one cam member construction should sufllce for a clear understanding. The arrangement of the cam members is more clearly shown in Figures 9 and 10. Each cam member has two helical surfaces 32 and 33 which start from a segmental flat surface 34 and extend therefrom in opposite directions and terminate at a segmental flat surface 35 identical with and diametrically opposite to the segmental surface 34 but lying in a different plane and in intaglio in the corresponding cam member. The adjacent surfaces of the cam members are arranged so as to be always in parallelism and are maintained in this spaced relationship by the spacer member 21.

The spacer member 21 is cut away on diametrically opposite sides for a portion of its circumference to provide segmental extensions 38 and 31. These cut away portions are arranged so as to be adjacent to but spaced from each of the helical surfaces 32 and 33 of the cam members thus providing inlet and exhaust ports for the fluid in a manner to be later described. These ports are arranged so that an inlet and exhaust port are side by side but on opposite sides of the spacer member and a paircf identical ports are arranged diametrically opposite but the position of the ports is reversed.

A rotor 38 of hardened steel has a peripheral extension 39 disposed concentrically within the spacer member 21 and adapted for running engagement with the inner peripheral surface of the latter. The peripheral extension 39 is preferably coextensive with the main portion of the spacer member 21 between the extensions 35 and 31 and has coaxial extensions 40 which rotate freely within aligned axial openings provided in the cam members 25 and 26 terminating slightly short of the adjacent end wall 24 and the cover plate 29 as more clearly shown in Figure 3. Stub shafts 4| and 42 are formed integral with the ends of the extensions 49 and are coaxial therewith being rotatably mounted in antifriction bearings 43 secured in the end wall 24 and cover plate 29. The peripheral extension 39 of the rotor is provided with a plurality of radially disposed slots 44 which extend entirely therethrough and in which blades or vanes 45 are slidably mounted. The blades 45 are somewhat longer than the length of the peripheral extension 39 thereby enabling the opposite ends of the blades to project beyond and to engage the adjacent surfaces of the cam members. Longitudinally extending grooves 48 are provided in the extensions 40 in alignment with the slots 44 within which the blades 45 slide transversely and are thus limited in their movement. These grooves further function to assist in assembling the rotor and blades within the spacer member by providing stop for the blades. The outer edges of the blades 45 are rounded for engagement with the inner peripheral surface of the spacer member and the adjacent faces of the cam members 25 and 29 to reduce frictional resistance to a minimum. The bottom edge of the blades which slide within the grooves 46 may be flat. It will be noted that as the rotor rotates the blades 45 by their engagement with the adjacent surfaces of the cam members are moved transversely successively and assume positions on opposite sides of the peripheral extensions 39.

The body portion 2| of the housing has an inlet opening 41 which is interiorly screwthreaded and adapted to receive a suitable conduit through which fluid is delivered into the pump. This inlet opening communicates with one end of an inlet passageway 48 which extends in a helical direction around one side of the body portion, communicating first with an inlet port 49 on one side of the peripheral extension 39 of the rotor and terminating in communication with an inlet port 59 on the opposite side of the peripheral extension 39 of the rotor diametrically opposite to the inlet port 49. An outlet passageway 5| communicates at one end with an outlet port 52 on one side of the peripheral extension 39 of the rotor and in this instance adjacent the inlet port 50 but on the opposite side of the peripheral extension, and extends in a helical direction around the opposite side of the body portion 2| communicating with an outlet port 53 on the opposite side of the peripheral extension 39 and in this case adjacent the inlet port 49. The other end of the outlet passageway communicates with an outlet opening 54 which is likewise interiorly screwthreaded and adapted to receive a conduit by which the fluid is discharged.

As the rotor rotates in a clockwise direction as viewed in Figure 1, the blades 45 are carried therewith and as the ends of the blades pass over the helical surface 32 and 33 of the cam members, the blades 45 are moved laterally successively on one side and alternately in the same manner on the opposite side.

Considering the action of the fluid on one side of the rotor, it is admitted under pressure at the inlet opening 41 where it is passed through the inlet passageway 48, a part of the fluid passing through the inlet port 48 and enters the chamber, between adjacent blades thus exerting pressure on the leading blade causing the rotor to rotate. The entrapped fluid is then moved around by the following blade and discharged out of the outlet port 52 on the same side of the pump but diametrically opposite to the inlet port 49, where it passes through the outlet passageway 5| and flnaly is discharged from the outlet opening 54.

The action of the fluid on .the other side of the pump is substantially the same except that a portion of the incoming fluid passes beyond the inlet port 49 and is discharged through the other inlet port 50 on the side opposite from the inlet port 49. The action on the blades is the same except that the pressure is exerted alternately with respect to the pressure action on the blades hereinbefore described and the fluid is discharged through the outlet port 53 where it passes out into the outlet passageway 5| and finally is discharged through the outlet opening 54. As the pressure exerted on the blades is the same on both sides of the pump the rotor is at all times balanced and in the present arrangement it will be noted that the incoming and discharged fluid travels in the same general direction which materially increases the efliciency of the pump.

The housing 20 has a hollow extension 55 formed integral with the body portion 2| and extending coaxial therewith, the free end terminating in a lateral flange 58 by means of which the housing may be suitably attached. A steel sleeve 51 fits within the outer end of the hollow extension and has a flange 58 fitting a bore in the end of the extension. A screw 59 is provided in the end of the extension and its'head engages a portion of the flange 58 to retain the sleeve 51 in place. A bronze bushing has a force fit within the sleeve 51 and is provided with a laterally extending flange 6|, which engages the inner end of the sleeve 51 as more clearly shown in Figure 3. A member 62 is rotatably mounted in the bushing 60 and has a laterally extending flange 53 at its inner end which engages the the square end of the stub shaft II. The flange 63 is provided with a bore adapted to receive a coiled spring 64 which encircles the stub shaft 4| and has one end abutting the bottom of the bore while the opposite end abuts the inner race of the bearing. This spring exerts a pressure on the member 60 so as to maintain the flange 63 in sealing engagement with the flange Bl on the bushing without interfering with their relative rotation. A plug 65 is fltted into the square opening in the member Gil and the outer end of the opening is adapted to receive a drive or driven connection.

In Figure 14 a modified construction of the earn and spacer member is shown wherein the spacer or sleeve 66 is substantially coextensive with the bore 61 and the cam members 68 and 59 are mounted within the opposite ends of the sleeve 66. The inner faces of the cam members are the same as heretofore described and cooperate with the blades 45 in a like manner. The sleeve 66 in this case, however, has inlet and exhaust ports 10 and H cut therethrough which are substantially the same shape and are positioned in the same relation as the inlet and exhaust heretofore described. The operation is the same but the structure illustrated in the former figures simplified the steps in manufacture. The subject-matter of Fig. 14, although not claimed in this application, is shown and claimed in our later filed co-pending application #123,634 for Pump.

While we have described the preferred embodiment of the invention it is to be understood that we are not to be limited thereto inasmuch as changes and modifications may be resorted to without departing from the spirit of the invention as defined in the appended claims.

What is claimed is:

1. A pump comprising a housing having an axial bore therein and inlet and outlet openings for the admission and discharge of fluid, a sleeve secured within said axial bore, cam members secured in said axial bore and disposed upon opposite sides of said sleeve, the inner adjacent sides of said members having pairs of helical surfaces arranged opposite one another but in reverse relation, the pairs of helical surfaces extending in spaced relation with respect to the adjacent portions of said sleeve to provide pairs of inlet and exhaust ports disposed on opposite sides of said sleeve and arranged in reverse relation diametrically opposite, said housing having an inlet passageway communicating at one end with said inlet opening and extending around one side thereof and communicating with the inlet ports on opposite sides of said sleeve, and an outlet passageway communicating at one end with said outlet opening and extending around the opposite side of said housing and communi, eating with the exhaust ports on opposite sides of said sleeve, a rotor rotatably mounted in said housing and having a peripheral extension adapted for running engagement with the inner pe- 7 ripheral surface of said sleeve between said inlet and exhaust ports, said extension having a plurality of radially disposed slots therein, and blades slidably mounted in said slots and having their opposite ends engageable with the iimer adjacent 75 sides of said cam members whereby during 1'0- tation of said rotor said blades are moved laterally successively in one direction and reversely in the opposite direction thereby causing fluid to be drawn through the inlet ports alternately on opposite sides of said extension and discharged from the exhaust ports alternately on opposite sides of said extension.

2. A pump comprising a housing having an axial bore therein and inlet and outlet openings for the admission and discharge of fluid, a sleeve secured within said axial bore, cam members secured in said axial bore and disposed upon opposite sides of said sleeve, the inner ad jacent sides of said members having pairs of helical surfaces arranged opposite one another but in reverse relation, the pairs of helical surfaces extending in spaced relation with respect to the adjacent portions of said sleeve to provide pairs of inlet and outlet ports disposed on opposite sides of said sleeve and arranged in reverse relation diametrically opposite, said housinghaving an inlet passageway communicating at one end with said inlet opening and extending around one side thereof and communicating with the inlet ports on opposite sides of said sleeve, and an outlet passageway communicating at one end.

with said outlet opening and extending around the opposite side of said housing and communicating with the exhaust ports on opposite sides of said sleeve, a rotor rotatably mounted in said housing and having a peripheral extension adapted for running engagement with the inner peripheral surface of said sleeve between said inlet and exhaust ports, said extension having a plurality of radially dispose-d slots therein, and blades slidably mounted in said slots and having their opposite ends engageable with the inner adjacent sides of said cam members whereby during rotation of said rotor said blades are moved laterally successively in one direction and reversely in the opposite direction thereby causing fluid to be drawn through the inlet ports alternately on opposite sides of said extension and discharged from exhaust ports alternately on opposite sides of said extension, the outer ends of said blades being engageable with the inner peripheral surface of said sleeve.

3. A pump comprising a housing having an axial bore therein and inlet and outlet openings for the admission and discharge of fluid, a sleeve secured within said axial bore, cam members secured in said axial bore and disposed upon opposite sides of said sleeve, the inner adjacent sides of said members having pairs of helical surfaces arranged opposite one another but in reverse relation, the pairs of helical surfaces extending in spaced relation with respect to the adjacent portions of said sleeve to provide pairs of inlet and exhaust ports disposed on opposite sides of said sleeve and arranged in reverse relation diametrically opposite, said housing having an inlet passageway communicating at one end with said inlet opening and extending around one side thereof and communicating with the inlet ports on opposite sides of said sleeve, and an outlet passageway communicating at one end with said outlet opening and extending around the opposite side of said housing and communieating with the exhaust ports on opposite sides of said sleeve, a rotorrotatably mounted in said housing and having a. peripheral extension adapted for running engagement with the inner peripheral surface of said sleeve between said inlet and exhaust ports, said extension having a plurality of radially disposed slots therein, and

blades slidably mounted in said slots and having their opposite ends engageable with the inner adjacent sides of said cam members whereby during rotation of said rotor said blades are moved laterally successively in one direction and reversely-in the opposite direction thereby causing. fluid to be drawn through the inlet ports alternately on opposite sides of said extension and discharged from the exhaust ports alternately on opposite sides of said extension, the ends of the blades being rounded to reduce frictional resistance.

4. A pump comprising a housing having an axial bore therein and inlet and outlet openings for the admission and discharge of fluid, a sleeve secured within said axial bore, cam members secured in said axial bore and disposed upon opposite sides of said sleeve, the inner adjacent sides of said members having pairs of helical surfaces arranged opposite one another but in reverse relation, the pairs of helical surfaces extending in spaced relation with respect to the adjacent portions of said sleeve to provide pairs of inlet and exhaust ports disposed on opposite sides of said sleeve and arranged in reverse relation diametrically opposite, said housing having an inlet passageway communicating at one end with said inlet opening and extending around one side thereof and communicating with the inlet ports on opposite sides of said sleeve, and an outlet passageway communicating at one end with said outlet opening and extending around the opposite side of said housing and communicating with the exhaust ports on opposite sides of said sleeve, a rotor provided with axial extensions anti-frictionally mounted in said housing and having a peripheral extension adapted for running engagement with the inner peripheral surface of said sleeve between said inlet and exhaust ports, said peripheral extension having a. plurality of radially disposed slots therein, and blades slidably mounted in said slots and having their opposite ends engageable with the inner adjacent sides of said cam members whereby during rotation of said rotor said blades are moved laterally successively in one direction and reversely in the opposite direction thereby causing fluid to be drawn through the inlet ports alternately on opposite sides of said extension and discharged from. the exhaust ports alternately on opposite sides of said extension.

5. A pump comprising a housing having an axial bore therein and inlet and outlet openings for the admission and discharge of fluid, a sleeve secured within said axial bore, cam members secured in said axial bore and disposed upon opposite sides of said sleeve, the inner adjacent sides of said members having pairs of helical surfaces arranged opposite one another but in reverse relation, the pairs of helical surfaces extending in spaced relation with respect to the adjacent portions of said sleeve to provide pairs of inlet and exhaust ports disposed on opposite sides of said sleeve and arranged in reverse relation diametrically opposite, said housing having an inlet passageway communicating at one end with said inlet opening and extending around one side thereof and communicating with the inlet ports on opposite sides of said sleeve, and an outlet passageway communicating at one end with said outlet opening and extending around the opposite side of said housing and communicating with the exhaust ports on opposite sides of said sleeve, said inlet and outlet openings, inlet and outlet passageways and inlet and exhaust ports being so arranged relatively that the fluid passes therethrough in the same general direction, a rotor rotatably mounted in said housing and having a peripheral extension adapted for running engagement with the inner peripheral surface of said sleeve between said' inlet and exhaust ports, said extension having a plurality of radially disposed slots therein, and blades slidably mounted in said slots and having their opposite'en-ds engageable with the inner adjacent sides of said cam members whereby during rotation of said rotor said blades are moved laterally successively in one direction and reversely in the opposite direction thereby causing fluid to be drawn through the inlet ports alternately on opposite sides of said extension and discharged from the exhaust ports alternately on opposite sides of said extension.

RALPH E. GREY.

BERNICE L. BOYNTON. 

